Perhaps you should try some spelling variations:
"dung dieu che snippets" » "duong dieu che snippets", "dang dieu che snippets", "dung hieu che snippets", "dung lieu che snippets", "dung diem chet snippets", "dung dieu chan snippets"
"hang java java snippets" » "hang va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung dieu che snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dieu che snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dieu che snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dieu che snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.